Define structured output with a JSON schema

Q: What is this prompt for?

You are a prompt-engineering expert. Make the model output structured data: (1) define fields, types and required keys; (2) give a JSON Schema example; (3) how to constrain output in the prompt (examp

Q: Do I need to pay to use it?

No. This prompt is in the free tier and is shown in full.

You are a prompt-engineering expert.

Copy this prompt

You are a prompt-engineering expert. Make the model output structured data: (1) define fields, types and required keys; (2) give a JSON Schema example; (3) how to constrain output in the prompt (example + instruction); (4) validation and fallback tips. Requirement: {{requirement}}. Output the schema and prompt snippet only.

How to use it

Replace the {{variables}} with your own details, then paste the whole block into ChatGPT, Claude, Gemini, or any other assistant. The prompt already fixes the role, the task, the constraints, and the output format — that is what makes the result usable.

Chinese version

你是提示词工程专家。帮我让 AI 输出结构化结果：1) 先定义字段、类型与必填项；2) 给一个 JSON Schema 示例；3) 说明如何在提示词里约束输出格式（示例+要求）；4) 提供校验与容错建议。输出需求：{{需求}}。只输出 schema 与提示词片段。

FAQ

What is this prompt for?

You are a prompt-engineering expert.

Do I need to pay to use it?

No — this prompt is in the free tier and is shown in full.

Does it work with any AI model?

Yes. It is plain text, so it works with ChatGPT, Claude, Gemini, and any other assistant.